Single-segment speed run of Metroid II: Return of Samus with 100% item collection. The displayed end time is ignored due to a flaw in the game's saving system which rounds the time down to whole minutes. Even on runs which don't save, the listed time is from the start of spawning until the end.
Author's comments: I've been playing Metroid II ever since I borrowed it from a friend in '92, and really haven't stopped playing it since. Had to buy a used pak a few times just because I'd lose it in moving, but hey, it's worth it. I hadn't really tried doing speed runs until now though, so I hadn't even heard about the acid dipping sequence break until a few weeks ago. In any case, it took quite a number of resets, and several hours of "practice runs" (*cough* mistake-ridden-speed-runs *cough*), but the stars finally aligned and 1:09:18 was achieved.
I'm pretty happy with most of the run. The first few minutes are probably the cleanest, since that's the most practiced portion (and hardest to perfect, due to all the morph-balling, and precision jumping). The main parts that slowed me down were a few missed jumps, and the metroid fights, especially the zeta metroids.
The route I took is intended to prevent any unnecessary backtracking by picking up new beams. So instead of collecting the beams at their earliest pickup location, I wait for the last ruins to collect them all in one fell swoop, ice beam last. This allows for a complete skip of the final refuel and ice beam pickup, which saves around 30 seconds alone, but also leaves for a slightly slower queen fight due to the requirement of the bombing method.
Overall, a pleasant run. I'd expect 1:08:xx is easily possible, and there's probably a possibility of 1:07:xx if the metroid fights can be done cleaner (and the last energy refill I took is skipped... I expected worse for the omegas).